Note that your final mark will not be saved in the system.
Waves Typeit
Type the correct answers into the spaces. Fill all the spaces before clicking ‘Check Answers!’
Waves transfer energy and information from one place to another. Waves can be defined in terms of: , the maximum distance that a particle in the wave moves from its equilibrium position; , the number of oscillations that occur per second (this is measured in ); and , the distance between two similar points on a wave. Electromagnetic waves are waves in electric and magnetic fields. All electromagnetic waves are (they oscillate perpendicular to the direction in which they travel) and always travel at the same in a vacuum, sometimes given the symbol c.
Refraction occurs when light passes a boundary between two transparent mediums with different . The ray with an arrow pointing away from the boundary is the refracted ray and its angle to the normal is the angle of .
Ultrasound can be used for medical imaging, including to construct images of a developing . It is non-invasive and it is believed to be harmless to both mother and infant. A produces and detects a beam of ultrasound waves. These waves off different boundaries between different tissues in the body (for instance, between the amniotic fluid and the developing baby), returning to the transducer. Knowing the at which the sound travels, i.e. the time taken for the beam to leave and return to the transducer, allows the of the boundaries from the transducer to be calculated. Taking various sweeping movements, information can be assimilated to give an accurate of the foetus inside the mother’s womb to be generated on a computer screen.
Earthquakes produce two types of waves: (primary waves) and (secondary waves). These waves pass through the earth and can be detected by , giving information about the magnitude and the location of an earthquake. are longitudinal and will pass through solids and liquids. Unlike the first type of wave, the second type – transverse waves – are unable to travel through and will only pass through . They are also slower than the first type of wave. The different ways in which these waves travel around the earth, and areas of where no primary waves are detected, give important information about the structure of the earth.